Find derivative of y with respect to derivative of x and solve it :
y=2x-36x+x+21

Read the equations in the table below. then drag a description of the situation and a table to represent each equation. indicate whether each of the relationships is proportional or non-proportional.

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827